Wall mounted blasting gun



Sept. 25, 1956 R. L. LUCE 2,763,964

WALL MOUNTED BLASTING GUN Filed Feb. 15, 1954 ATTORNEYS.

United States Patent 2,763,964 WALL MGUNTED BLASTING GUN Roy L. Luce,Chicago, Ill., assignor to The Hydro-Blast Corporation, Chicago, 111., acorporation of Illinois Application February 15, 1954, Serial No.410,351 8 Claims. (Cl. 51-8) This invention relates generally to a wallmounted blasting gun of the type employed for ejecting a high velocitystream of combined fluid and abrasive against a surface to be eroded andmore particularly to mounting means for positioning and directing thenozzle of such a gun relative to a work surface so as to permit flowfrom the gun to be aimed in any selected direction by an operatorpositioned as a fixed location remote from the nozzle.

It is a primary object of the present invention to provide a blastinggun having wall mounting means operative to permit pivotal movement ofthe gun supporting arm relative to the mounting wall in both verticaland lateral planes, and to further permit individual pivotal movement ofthe nozzle of the gun in a vertical plane about its point of connectionto the gun supporting arm.

It is another object of this invention to provide a wall mountingblasting gun having controlled pivotal movement relative to the mountingwall in both vertical and lateral planes, and controlled pivotalmovement in a vertical plane of the nozzle about the pivotally mountedgun supporting arm, in cooperative adjacent relation to work supportingmeans rotatable in a horizontal plane.

With these and other objects in view, my invention consists in theconstruction, arrangement and combination of the various parts of mywall mounted blasting gun whereby the objects contemplated are obtainedas hereinafter more fully set forth, pointed out in my claims andillustrated in the accompanying drawing, wherein:

Figure 1 is a perspective view of a blasting gun constructed inaccordance with the present invention.

Figure 2 is a top elevational view, partly in section, showing the gunmounted on a wall structure.

Figure 3 is a side elevational view, partly in section, of the gun asshown in Figure 2, and further showing a work supporting turntable inadjacent operative relation to the gun.

In the drawing 1 have used the reference numeral to designate a blastinggun, generally. The gun comprises a nozzle 12 positioned at one end of agun supporting arm 20. The nozzle is provided with a fitting forattachment of a delivery line 14 for sand or other abrasive material.The nozzle communicates at its rear end with a mounting tube 15 whichprovides a fitting for attachment of a high pressure water line 16.Swivel joints 13 and 19 serve to pivotally interconnect the nozzle 12 toone end of the mounting tube 15, and the other end of the mounting tube15 to the water line 16. Brackets 22 serve to fixedly secure themounting tube 15 to the forward end of the supporting arm 20.

A crank means extends through the length of the mounting tube 15 foractuating pivotal movement of the nozzle 12 in a vertical plane. Thecrank means includes a rod 24 rotatably supported within the mountingtube 15 by means of annular bearings 26, 27. Handle means 28 areprovided at the end of the crank means remote from the nozzle 12. Afirst bevel gear 30 is secured to the forward end of the crank rod 25adjacent the nozzle 12. Rotation of the crank handle 28 will efiectrotation of the bevel gear 30.

A second bevel gear 32 is rotatably mounted on the gun nozzle 12 andengages the first bevel gear 30. It will be apparent that rotation ofthe first bevel gear 30 eifects rotation of the second bevel gear 32,hereby causing the nozzle 12 to pivot about the swivel joint 18 in asubstantially vertical plane. The angle of pivotal movement of thenozzle 12, indicated at A in Figure 3, is limited to about 270 in thearrangement of parts shown in the drawing.

In Figures 2 and 3 I have shown the blasting gun of the presentinvention mounted on a substantially vertical wall, indicated generallyat W. A mounting plate 34 defines an opening 35 through the wall W. Aresilient rubber sealing shroud 36 is secured to the mounting plate 34and the gun supporting arm 20. In this manner, a resilient seal isprovided between the opposite sides of the wall W to prevent the passageof dellected blasting materials and work particles therethrough, whilepermitting pivotal movement of the supporting arm 20 in vertical andlateral planes relative to the wall, as will hereinafter be described indetail.

A gimbal frame 38 provides a substantially horizontal pivot axis 40 uponwhich the gun supporting arm 24 is pivotally secured. The gimbal frame38 also provides a vertical pivot axis 42 for rotation of the gimbalframe and the blasting gun carried thereby.

A pair of parallel bracket arms 44 are rigidly secured, as by welding,to the gimbal frame 38, and extend away from the gun supporting arm 20.A support assembly 46 is pivotally secured to the free ends of thebracket arms 44 upon a substantially horizontal pivot axis. The supportassembly 46 includes a mounting plate 47, and a freely rotatable annularcollar or bearing ring 48. A motor St is secured to the mounting plate47.

A screw threaded drive rod 52 is fixedly received at its one end in asleeve 54 which is pivotally secured to the gun supporting arm 20 on asubstantially horizontal pivot axis. A drive wheel or pulley 56 isadapted to be driven for rotation by a drive belt (not shown) connectedto the drive shaft of the motor 50. The wheel 56 is provided with anaxially extending hub portion 57, which is internally screw threaded toreceive the drive rod 52 in cooperative engagement therethrough. The hub57 of wheel 56 is secured by means of thrust pins 58 to the collar 48.

It will be apparent that operation of the motor serves to rotate thedrive wheel or pulley 56, thereby effecting longitudinal movement of thedrive rod 52 through the pivotally mounted support assembly 46 of thebracket arms 44. Forward drive and reversal of the motor in se lecteddirections will serve to shift the drive rod 52 through the supportassembly 46, as desired. In this manner, the gun supporting arm 20 maybe pivotally swung about the horizontal pivot axis 40, thereby effectingup and down movement of the blasting gun nozzle 12 through an arc,indicated at B in Figure 3, lying within a substantially vertical plane.The particular arrangement of parts disclosed permits an arc of movementof the gun about the horizontal pivot axis 40 of about 50- It will beapparent that the gimbal frame 38 permits the entire gun assembly to bepivotally swung from side to side, as indicated by the are C in Figure2. Such movement is manually elfected by the operator, and in theparticular arrangement of parts shown includes an angle of arc of about60.

In Figure 3 of the drawing, I have also shown a turntable 60 upon whichthe work ie e to be abraded may be positioned. Manual crank means 62permits rotation of the turntable by the operator to eifect turning ofthe horizontal support plane through a full arc of rotation of 360.

The novel construction of the present invention permits the nozzle endof the blasting gun, and at the opposite side of a protective wall orshield, to effect direction of the gun blast at any desired angle. Thisoperation is achieved by providing nozzle rotation in a vertical planethrough an arc of 270"; by providing pivotal swinging of the gunsupporting arm and the nozzle carried thereby through an arc in avertical plane of 50 and by providing pivotal swinging of the entire gunassembly laterally from side to side through an arc of 60. Such a widevariety of positions of gun orientation, in cooperation with a workturntable permitting full 360 rotation of the piece to be abraded,permits the spray of a blasting gun employing my novel mountingconstruction to be aimed in any desired direction.

Changes may be made in the construction and arrangement of the parts ofmy wall mounted blasting gun without departing from the real spirit andpurpose of my invention, and it is my intention to cover by my claimsany modified forms of structure or use of mechanical improvements whichmay be reasonably included within their scope.

I claim as my invention:

1. A blasting gun comprising a supporting arm, means for mounting thesupporting arm in an opening in a mounting wall for pivotal movementabout a horizontal axis in a Vertical plane and about a vertical axis inlateral planes perpendicular to said vertical plane, a nozzle pivotallycarried by one end of said arm, actuator means operatively connected tosaid nozzle to effect pivotal movement of the nozzle relative to saidarm in a vertical plane, bracket means rigidly secured to the mountingmeans, adjustable means connecting the bracket means to the supportingarm to hold said supporting arm at an ad justable angle of inclinationabout said horizontal axis, and drive means connected to the adjustablemeans and operative to vary said angle of inclination.

2. A blasting gun comprising a supporting arm, gimbal means secured tosaid arm and adapted to be fixed in a wall opening, a nozzle pivotallycarried at one end of said arm, actuator means operatively connected tosaid nozzle to effect pivotal movement of the nozzle relative to saidarm in a vertical. plane, bracket means fixedly secured to said gimbalmeans and extending outwardly therefrom in a vertical plane, a collarmember pivotally secured to the free end of said bracket means, a driverod having its one end pivotally secured to said arm and its other endextending through said collar member, and drive means operative to drawsaid rod through said collar member.

3. A blasting gun comprising a supporting arm, gimbal means secured tosaid arm and adapted to be fixed in a wall opening, a nozzle pivotallycarried at one end of said. arm, crank moans extending the length ofsaid arm, said crank means being'operatively connected at its one end tosaid nozzle to effect pivotal movement of the nozzle relative to saidarm in a vertical plane, handle means at the other end of said crankmeans remote from said nozzle for actuating said crank to effect pivotalmovement of said nozzle, bracket means fixedly secured to said gimbalmeans and extending outwardly therefrom in a vertical plane, a collarmember pivotally secured to the free end of said bracket means, a driverod having its one end pivotally secured to said arm and its other endextending through said collar member, and drive means operative to drawsaid rod through said collar member.

4. A blasting gun comprising a supporting arm, gimbal means secured tosaid arm and adapted to be fixed in a wall opening, a nozzle pivotallycarried at one end of said arm, crank means extending the length of saidarm, said crank means being operatively connected at its one end bymeans of bevel gears to said nozzle for effecting pivotal movement ofthe nozzle relative to said arm in a vertical plane upon rotation ofsaid crank means, handle means at the other end of said crank meansremote from said nozzle for rotating said crank to effect pivotalmovement of said nozzle, bracket means fixedly secured to said gimbalmeans and extending outwardly therefrom in a vertical plane, a collarmember pivotally secured to the free end of said bracket means, a driverod having its one end pivotally secured to said arm and its other endextending through said collar member, and drive means operative to drawsaid rod through said collar member.

5. A blasting gun comprising a supporting arm, gimbal means for securingsaid arm in a wall opening for pivotal movement relative thereto, saidsupporting arm being secured to said gimbal means upon a horizontalpivot axis extending therethrough, said gimbal means having a verticalpivot axis for lateral pivotal movement relative to a wall opening, anozzle pivotally carried at one end of said supporting arm, actuatormeans operatively connected to said nozzle to effect pivotal movement ofthe nozzle relative to said arm in a vertical plane through an angle ofabout 270 including the forward direction longitudinally coaxial withsaid supporting arm, bracket means fixedly secured to said gimbal meansand extending outwardly therefrom in a vertical plane, a collar memberpivotally secured to the free end of said bracket means, a drive rodhaving its one end pivotally secured to said arm and its other endextending through said collar member, and drive means operative to drawsaid rod through said collar member, whereby said supporting arm may bepivoted in a vertical plane about the horizontal pivot axis of saidgimbal means through an angle of about 50, the vertical pivot axis ofsaid gimbal means permitting said supporting arm to be pivoted inlateral planes perpendicular to said last named vertical plane throughan angle of about 60.

6. A blasting gun comprising a supporting arm, gimbal means for securingsaid arm in a wall opening for pivotal movement relative thereto, saidsupporting arm being secured to said gimbal means upon a horizontalpivot axis extending therethrough, said gimbal means having a verticalpivot axis for lateral pivotal movement relative to a wall opening, anozzle pivotally carried at one end of said supporting arm, actuatoroperatively connected to said nozzle to effect pivotal movement of thenozzle relative to said arm in vertical plane through an angle of about270 including the forward direction longitudinally coaxial with saidsupport ing arm, bracket means rigidly securing said supporting arm atan angle of inclination through said horizontal pivot axis relative tosaid wall opening, and drive means operative to vary said angle ofinclination, whereby said supporting arm may be pivoted in a verticalplane about the horizontal pivot axis of said gimbal means through anangle of about 50, the vertical pivot axis of said gimbal meanspermitting said supporting arm to be pivoted in lateral planesperpendicular to said last named vertical plane through an angle ofabout 60.

7. A blasting gun for wall mounting comprising an elongatedrigidsupporting arm to project through an opening in a wall of an enclosure,means mounting the arm on the wall for pivotal movement in both verticaland horizontal planes, a nozzle pivotally mounted on a horizontal axison the end of the arm Within the enclosure, actuator means to swing thenozzle about said horizontal axis and an operating member connected tothe actuator means and extending from the end of the arm outside of theenclosure to be controlled by an operator outside of the enclosure.

8. A blasting gun for Wall mounting comprising an elongated rigidsupporting arm to project through an opening in a wall of an enclosure,means mounting the arm on the wall for pivotal movement in both verticaland horizontal planes, a nozzle pivotally mounted on a horizontal axison the end of the arm within the enclosure, actuator means to swing thenozzle about said horizontal axis, an operating member connected to theactuator means and extending from the end of the arm outside of theenclosure to be controlled by an operator outside of the enclosure, andpower means outside of the enclosure connected to the arm to swing thearm in a vertical plane.

Wright May 30, 1911 10 Heaslet Sept. 3, 1912 Hoevel Jan. 10, 1928 LoomisMay 30, 1933 Davis Oct. 19, 1943 Arispe Aug. 21, 1951 Webster Feb. 17,1953

